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Exmouth Gulf Wetlands After Rain
Sunday, March 30 2008
Video (6min 32sec) of the east coast of Exmouth Gulf after rain.
The second half of the video shows before the rain. The video indicates
the flow of freshwater and silt through the wetlands system. Also
see images below.
Straits Resources has previously sought to refute
the importance of these rainfall events and has claimed they are
a rare occurrence. But the new footage again demonstrates the
importance of these recharge events to the Exmouth Gulf eco-system.
This is the first time since the Halt the Salt Campaign commenced
two and a half years ago that we have had a significant rainfall
event over Yannarie Creek catchment despite six cyclones having
been in the vicinity since that time.
But this just underlines the sporadic but critical nature of
these events. Of the six, all were closer to Exmouth gulf than
TC Pancho which was 700 km to the west of Ningaloo. But TC Pancho
was the one! 380mm of rain in one day at North West Cape!
Rainfall events since the Cylone Bobby event have been:
Cyclone details since 1995:
TC Bobby Feb 1995
TC Frank Dec 1995
TC Vance Mar 1999
TC Steve Mar 2000
TC Pancho March 2008 (trough triggered by cyclone 700km off the
coast) (268mm over 4 days at Learmonth Airport 20 km south of
Also, in June 2002 a low pressure system caused 89mm of rain
to fall in Exmouth in 4 hours. As a consequence, flood waters
from the town of Exmouth broke through as a fast flowing torrent
into the marina, causing 2 prawning trawlers to turn turtle in
their cyclone proof pens.
All these cyclones had rainfall in excess of 200mm associated